Bren Ten, manufactured by Dornaus & Dixon, was a stainless-steel handgun that was used during the first season by Sonny Crockett (Johnson).[77] It was the state-of-the-art gun during the first two seasons of Miami Vice, until Dornaus & Dixon went out of business in 1986.[77] Since the company went out of business, the Miami Vice production couldn't allow Crockett to use an out of date firearm. Smith & Wesson was given the contract to outfit Sonny (Johnson) with a S&W Model 645.[80][81][77] This was the gun used in the third season of Miami Vice.[77] Later on in the series, Crockett would also use a S&W Model 4506,[75] a Detonics Combat-Master,[40] and a S&W Model 4513.[69]

Ricardo Tubbs (Philip Michael Thomas) used a sawed-off double-barreled shotgun in the first season. In later seasons, he used an Ithaca 37 sawed-off pump shotgun called an Ithaca Stakeout,[77] and a Sig Sauer 9 mm P228.[81] Stan Switek can be seen using a variety of weapons, including a nickel-plated 9mm FN GP-35 Hi-Power.[44] The other characters of the show can be seen using different model firearms. The villains of the show used Steyr AUG[80] and M16 assault rifles,[77] H&K MP5 submachine guns, and the Street-Sweeper shotgun.

Jarhead: good info, as I remember all three handguns you listed!
Back then, I used to keep track of firearms alot more than I do now. I knew the Bren 10 manufactures went out of bidness. I saw he had a 645 and that little 1911 as backup....amazing how he never printed with them!